Two of the largest pledges come from Bank of America and General Motors Co. GM has pledged to cut their carbon emissions by 20% in the next 5 years, while BOA pledged $75M to help combat the problem.

Apple, which is already the cleanest company of the bunch (they already run their entire stateside operation on renewable energy) said they will bring an additional 280 megawatts of ‘clean energy’ online. Some of this clean energy may be used to power some of the company’s Chinese operations.

Some might see the move as mostly symbolic as the companies involved with the announcement are not very large polluters as far as carbon emissions go. Most carbon emissions come from the energy sector. No companies from that business sector were involved in this announcement.